*/
#include "internal.h"
-#include "Application.h"
-#include "exceptions.h"
-#include "ServiceProvider.h"
-#include "SessionCache.h"
-#include "attribute/resolver/ResolutionContext.h"
#include "handler/AssertionConsumerService.h"
-#include <saml/saml1/core/Assertions.h>
-#include <saml/saml1/core/Protocols.h>
-#include <saml/saml1/profile/BrowserSSOProfileValidator.h>
-#include <saml/saml2/metadata/Metadata.h>
-
-using namespace shibsp;
+#ifndef SHIBSP_LITE
+# include "exceptions.h"
+# include "Application.h"
+# include "ServiceProvider.h"
+# include "SessionCache.h"
+# include "attribute/resolver/ResolutionContext.h"
+# include <saml/saml1/core/Assertions.h>
+# include <saml/saml1/core/Protocols.h>
+# include <saml/saml1/profile/BrowserSSOProfileValidator.h>
+# include <saml/saml2/metadata/Metadata.h>
using namespace opensaml::saml1;
using namespace opensaml::saml1p;
using namespace opensaml;
-using namespace xmltooling;
-using namespace log4cpp;
-using namespace std;
using saml2::NameID;
using saml2::NameIDBuilder;
using saml2md::EntityDescriptor;
+using saml2md::SPSSODescriptor;
+using saml2md::MetadataException;
+#else
+# include "lite/SAMLConstants.h"
+#endif
+
+using namespace shibsp;
+using namespace xmltooling;
+using namespace std;
namespace shibsp {
{
public:
SAML1Consumer(const DOMElement* e, const char* appId)
- : AssertionConsumerService(e, appId, Category::getInstance(SHIBSP_LOGCAT".SAML1")) {
+ : AssertionConsumerService(e, appId, Category::getInstance(SHIBSP_LOGCAT".SSO.SAML1")) {
+#ifndef SHIBSP_LITE
+ m_post = XMLString::equals(getString("Binding").second, samlconstants::SAML1_PROFILE_BROWSER_POST);
+#endif
}
virtual ~SAML1Consumer() {}
+#ifndef SHIBSP_LITE
+ void generateMetadata(SPSSODescriptor& role, const char* handlerURL) const {
+ AssertionConsumerService::generateMetadata(role, handlerURL);
+ role.addSupport(samlconstants::SAML11_PROTOCOL_ENUM);
+ role.addSupport(samlconstants::SAML10_PROTOCOL_ENUM);
+ }
+
private:
string implementProtocol(
const Application& application,
const PropertySet* settings,
const XMLObject& xmlObject
) const;
+ bool m_post;
+#endif
};
#if defined (_MSC_VER)
};
+#ifndef SHIBSP_LITE
+
string SAML1Consumer::implementProtocol(
const Application& application,
const HTTPRequest& httpRequest,
// Implementation of SAML 1.x SSO profile(s).
m_log.debug("processing message against SAML 1.x SSO profile");
+ // Check for errors...this will throw if it's not a successful message.
+ checkError(&xmlObject);
+
// With the binding aspects now moved out to the MessageDecoder,
- // the focus here is on the assertion content. For SAML 1.x,
+ // the focus here is on the assertion content. For SAML 1.x POST,
// all the security comes from the protocol layer, and signing
// the assertion isn't sufficient. So we can check the policy
- // object now and bail if it's not a secure message.
- if (!policy.isSecure())
- throw SecurityPolicyException("Security of SAML 1.x SSO response not established.");
-
- // Check for errors...this will throw if it's not a successful message.
- checkError(&xmlObject);
+ // object now and bail if it's not a secured message.
+ if (m_post && !policy.isAuthenticated()) {
+ if (policy.getIssuer() && !policy.getIssuerMetadata())
+ throw MetadataException("Security of SAML 1.x SSO POST response not established.");
+ throw SecurityPolicyException("Security of SAML 1.x SSO POST response not established.");
+ }
+
+ // Remember whether we already established trust.
+ bool alreadySecured = policy.isAuthenticated();
const Response* response = dynamic_cast<const Response*>(&xmlObject);
if (!response)
if (assertions.empty())
throw FatalProfileException("Incoming message contained no SAML assertions.");
+ pair<bool,int> minor = response->getMinorVersion();
+
// Maintain list of "legit" tokens to feed to SP subsystems.
const AuthenticationStatement* ssoStatement=NULL;
vector<const opensaml::Assertion*> tokens;
+ // Also track "bad" tokens that we'll cache but not use.
+ // This is necessary because there may be valid tokens not aimed at us.
+ vector<const opensaml::Assertion*> badtokens;
+
// Profile validator.
time_t now = time(NULL);
BrowserSSOProfileValidator ssoValidator(application.getAudiences(), now);
// With this flag on, we ignore any unsigned assertions.
pair<bool,bool> flag = settings->getBool("signedAssertions");
+ // authnskew allows rejection of SSO if AuthnInstant is too old.
+ const PropertySet* sessionProps = application.getPropertySet("Sessions");
+ pair<bool,unsigned int> authnskew = sessionProps ? sessionProps->getUnsignedInt("authnskew") : pair<bool,unsigned int>(false,0);
+
+ // Saves off error messages potentially helpful for users.
+ string contextualError;
+
for (vector<saml1::Assertion*>::const_iterator a = assertions.begin(); a!=assertions.end(); ++a) {
// Skip unsigned assertion?
if (!(*a)->getSignature() && flag.first && flag.second) {
m_log.warn("found unsigned assertion in SAML response, ignoring it per signedAssertions policy");
+ badtokens.push_back(*a);
continue;
}
try {
- // Run the policy over the assertion. Handles issuer consistency, replay, freshness,
- // and signature verification, assuming the relevant rules are configured.
+ // We clear the security flag, so we can tell whether the token was secured on its own.
+ policy.setAuthenticated(false);
+ policy.reset(true);
+
+ // Extract message bits and re-verify Issuer information.
+ extractMessageDetails(
+ *(*a), (minor.first && minor.second==0) ? samlconstants::SAML10_PROTOCOL_ENUM : samlconstants::SAML11_PROTOCOL_ENUM, policy
+ );
+
+ // Run the policy over the assertion. Handles replay, freshness, and
+ // signature verification, assuming the relevant rules are configured.
policy.evaluate(*(*a));
+
+ // If no security is in place now, we kick it.
+ if (!alreadySecured && !policy.isAuthenticated()) {
+ m_log.warn("unable to establish security of assertion");
+ badtokens.push_back(*a);
+ continue;
+ }
// Now do profile and core semantic validation to ensure we can use it for SSO.
ssoValidator.validateAssertion(*(*a));
tokens.push_back(*a);
// Save off the first valid SSO statement.
- if (!ssoStatement && !(*a)->getAuthenticationStatements().empty())
- ssoStatement = (*a)->getAuthenticationStatements().front();
+ const vector<AuthenticationStatement*>& statements = const_cast<const saml1::Assertion*>(*a)->getAuthenticationStatements();
+ for (vector<AuthenticationStatement*>::const_iterator s = statements.begin(); s!=statements.end(); ++s) {
+ if (authnskew.first && authnskew.second &&
+ (*s)->getAuthenticationInstant() && (now - (*s)->getAuthenticationInstantEpoch() > authnskew.second))
+ contextualError = "The gap between now and the time you logged into your identity provider exceeds the limit.";
+ else if (!ssoStatement) {
+ ssoStatement = *s;
+ break;
+ }
+ }
}
catch (exception& ex) {
- m_log.warn("profile validation error in assertion: %s", ex.what());
+ m_log.warn("detected a problem with assertion: %s", ex.what());
+ badtokens.push_back(*a);
}
}
- if (!ssoStatement)
- throw FatalProfileException("A valid authentication statement was not found in the incoming message.");
+ if (!ssoStatement) {
+ if (contextualError.empty())
+ throw FatalProfileException("A valid authentication statement was not found in the incoming message.");
+ throw FatalProfileException(contextualError.c_str());
+ }
// Address checking.
SubjectLocality* locality = ssoStatement->getSubjectLocality();
m_log.debug("SSO profile processing completed successfully");
+ NameIdentifier* n = ssoStatement->getSubject()->getNameIdentifier();
+
+ // Now we have to extract the authentication details for attribute and session setup.
+
+ // Session expiration for SAML 1.x is purely SP-driven, and the method is mapped to a ctx class.
+ pair<bool,unsigned int> lifetime = sessionProps ? sessionProps->getUnsignedInt("lifetime") : pair<bool,unsigned int>(true,28800);
+ if (!lifetime.first || lifetime.second == 0)
+ lifetime.second = 28800;
+
// We've successfully "accepted" at least one SSO token, along with any additional valid tokens.
- // To complete processing, we need to resolve attributes and then create the session.
+ // To complete processing, we need to extract and resolve attributes and then create the session.
- // First, normalize the SAML 1.x NameIdentifier...
- auto_ptr<NameID> nameid(NameIDBuilder::buildNameID());
- NameIdentifier* n = ssoStatement->getSubject()->getNameIdentifier();
+ // Normalize the SAML 1.x NameIdentifier...
+ auto_ptr<NameID> nameid(n ? NameIDBuilder::buildNameID() : NULL);
if (n) {
nameid->setName(n->getName());
nameid->setFormat(n->getFormat());
nameid->setNameQualifier(n->getNameQualifier());
}
- const EntityDescriptor* issuerMetadata = dynamic_cast<const EntityDescriptor*>(policy.getIssuerMetadata()->getParent());
+ // The context will handle deleting attributes and new tokens.
auto_ptr<ResolutionContext> ctx(
- resolveAttributes(application, httpRequest, issuerMetadata, *nameid.get(), &tokens)
+ resolveAttributes(
+ application,
+ policy.getIssuerMetadata(),
+ (!response->getMinorVersion().first || response->getMinorVersion().second==1) ?
+ samlconstants::SAML11_PROTOCOL_ENUM : samlconstants::SAML10_PROTOCOL_ENUM,
+ n,
+ nameid.get(),
+ ssoStatement->getAuthenticationMethod(),
+ NULL,
+ &tokens
+ )
);
- // Copy over any new tokens, but leave them in the context for cleanup.
- tokens.insert(tokens.end(), ctx->getResolvedAssertions().begin(), ctx->getResolvedAssertions().end());
+ if (ctx.get()) {
+ // Copy over any new tokens, but leave them in the context for cleanup.
+ tokens.insert(tokens.end(), ctx->getResolvedAssertions().begin(), ctx->getResolvedAssertions().end());
+ }
- // Now we have to extract the authentication details for session setup.
+ // Now merge in bad tokens for caching.
+ tokens.insert(tokens.end(), badtokens.begin(), badtokens.end());
- // Session expiration for SAML 1.x is purely SP-driven, and the method is mapped to a ctx class.
- const PropertySet* sessionProps = application.getPropertySet("Sessions");
- pair<bool,unsigned int> lifetime = sessionProps ? sessionProps->getUnsignedInt("lifetime") : make_pair(true,28800);
- if (!lifetime.first)
- lifetime.second = 28800;
- auto_ptr_char authnInstant(
- ssoStatement->getAuthenticationInstant() ? ssoStatement->getAuthenticationInstant()->getRawData() : NULL
- );
- auto_ptr_char authnMethod(ssoStatement->getAuthenticationMethod());
-
- vector<shibsp::Attribute*>& attrs = ctx->getResolvedAttributes();
- string key = application.getServiceProvider().getSessionCache()->insert(
- lifetime.second ? now + lifetime.second : 0,
+ return application.getServiceProvider().getSessionCache()->insert(
+ now + lifetime.second,
application,
httpRequest.getRemoteAddr().c_str(),
- issuerMetadata,
- *nameid.get(),
- authnInstant.get(),
+ policy.getIssuerMetadata() ? dynamic_cast<const EntityDescriptor*>(policy.getIssuerMetadata()->getParent()) : NULL,
+ (!response->getMinorVersion().first || response->getMinorVersion().second==1) ?
+ samlconstants::SAML11_PROTOCOL_ENUM : samlconstants::SAML10_PROTOCOL_ENUM,
+ nameid.get(),
+ ssoStatement->getAuthenticationInstant() ? ssoStatement->getAuthenticationInstant()->getRawData() : NULL,
NULL,
- authnMethod.get(),
+ ssoStatement->getAuthenticationMethod(),
NULL,
&tokens,
- &attrs
+ ctx.get() ? &ctx->getResolvedAttributes() : NULL
);
- attrs.clear(); // Attributes are owned by cache now.
- return key;
}
+
+#endif